cockpit on 15.6, Sudo: unable to run /nonexistent/libexec/cockpit-askpass: No such file or directory sudo: no password was provided sudo: a password is required

Support, cockpit on 15.6

Problem becoming administrator Sudo: unable to run /nonexistent/libexec/cockpit-askpass: No such file or directory sudo: no password was provided sudo: a password is required

Never used cockpit before. Similar like webmin or so? I can only log into cockpit with a local normal user using for KDE desktop as well. Inside cockpit it tells me that it is restricted mode or something and some root stuff is missing coming up with a popup when I click that blue topmost notification or button with text given: "turn on administrative access". the result is that stated error message popup. Anyone running this successfully? ty